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E. cool cells with a muted z gene of the...

E. cool cells with a muted z gene of the lack operon connot grow in medium conatining only lactose as to surce of energy because -

A

They cannot synyhesize functionsl betagalctosides

B

They cannot transport lactose from the medium into the cell

C

The lac operon is constitutively active in these cells

D

In the presentce of glucose, E. coil cells to not utilize lactose

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The correct Answer is:
A
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